Assiohobs to westinghouse electric



J. H. PROCTER AND M. J. SANDIN. REFILLABLE FUSE.

APPLICATION FILED ma.25.1919. RENEWED AFR. 10,1922.

1,425,692, Patented Aug. 15, 1922.

9 32 I a; 22 22 22 a;

WITNESSES:

INVENTORS JdJep/l A! Procfer Maurl'fJ .{erume Sand n ATTORNEY um'rsns'rA'rss PATENT OFFICE.

JOSEPH K. rm m BUB-ITS J. smut, Oil wmxmsnm, rmmvnrra, ASSIGHOBS IO'WBIIIGHOUSE ELECTRIC 6t IAHUI'AC'I'UEIHG 001mm, 1. B-

PORATIOI OI mammal: roar.

Specification of Letters Patent.

Patented Aug. 15, 1922.

Application mar mumas, me, Serial Io. 21am. Renewed April 10, mil.Serial I. 551,195.

V the county of Allegheny and State of Pennsylvania, have invented a newand useful Improvement in Refillable Fuses, of which the following is aspecification.

Our invention relates to fuses and particlllarly to refillable-cartridgefuse tennina One object of our invention is to provide and walls, for arefillable-cartridge fuse, that shall assist in aligning knife-bladeterminal members, provide packing for sealing the cartridge and, bybeing removable as units, transversely and from one side only of theblade members, shall facilitate the operation of refillin the cartridge.

Another object 0 our invention is to provide a cartrid fuse terminalthat, for compactness, s all comprise a transverse web of suchdimensions as to permit of its passage through the tube and of a formthat when it is disposed in co-operative relation with a complementalremovable plate therefor constitutes a single disk of uniform thicknessand greater diameter than the bore of the tube. A

In practicing our invention, we provide a fuse cartridge having bladecontact terminal members at the ends thereof and transversely-disposedclosure, aligning and packing members embracing the blades and ofsuchrelation to one another as to minimize the total thickness of theend walls of the cartridge.

Further, these members are connected to permit the removal thereof as asingle unit and formed to permit the removal, transversely and from oneside only, of the blade member.

Fig. 1 of the accompan ing drawings is a longitudinal view, partial y inelevation and artially in section, of a cartridge fuse emdying ourinvention; Fig. 9 is an interior end view of the same. taken along theline Il-II of Fig. 1; Flg. 3 is an exterior end v ew of the device asillustrated in Fig. 1;

Figs. 4, 5, 6, 7 and 8 are detail views of the partially outside theends of t e member 1.

Bolts 5, or other suitable means, secure a fusible element 6 betweenapertured inner end portions 7 of the members 4 and the latter may beattached by the outer end portions 8 thereof to terminal jaws or clips(not shown) of an electric circuit. The portions 8, being of greaterwidth than the portions 7, provide shoulders 9 against which resttransverselyextending webs 10 of substantially fan shape andhavingcentral openings 11 therein conforming to the portions 7. The webs10 rigidly embrace the portions 7 and form a gas-tight 'oinder therewithas, b being soldered, we ged or otherwise suita. ly secured thereto.

As illustrated in Fig. 4, each web 10 comprises a flat piece of copperor other suitable material of substantially fan shape. An initiallycentrally-disposed three-sided rectangular tongue portion 12 is pressedout of the plane of the web 10 and bent into and around a notch 13 inone edge of the same to constitute a positioning lug, Figs. 1, 2 and 3,that engages a notch 14 at the end of the member 1, and prevents turningof the {)erminal member 4 with respect to the memer 1. I

The tongue portion 12 may be formed with a relatively wide curve 15, F n9, as a precaution against fracture at the nd and extend only to theedge of the web 10, 1n which form the notch 13 is omitted.

A discoidal plate member 16, preferably of the same material andthickness as the web 10, is centrally recessed and formed to closelyembrace the web 10 in edge-to-edge relation therewith, whereby themember 16 and the web 10 constitute substantially a single disk ofuniform thickness and greater diameter than the bore of the tubularmember 1.

A packing washer 17, of leather or other suitable material, having acentrally disposed slot 18 adapting it to he slipped trans versely overthe portion 8 of the member 4, may be removably positioned between ametal washer 19, having a centrally disposed slot 20, and the member 16by screws 21 that extend through holes 22 in the members 16 17 and 19 toform a removable compound washer or unitary-wall structure 23 formounting on the portion 8 adjacent the web 10 to permit the latter andthe member 16 to assume the above described single-disk relation.

In order to prevent longitudinal displacement of the member 16 withrespect to the web 10 and the terminal member 4, the portion 8 isprovided with an edge notch 24 in which portions of the washers 16 and 19 are dis osed adjacent the plate 10.

n Fig. 9 projections 25, suitably formed, as by knocking up the surfaceof the membar 4, serve as means for preventing the longitudinaldisplacement of the member 23.

In Fig. 10 a transverse groove 26, in one or both sides of the memberserves to prevent the displacement of the member 23.

When the wall structure 23 is placed in operative relation to the member4 and the web 10, it is maintained in position against the end of themember 1 by the flange 3 of the ferrule 2. The packing washer 17 coversthe engaging edges of the web 10 and the member 16 to retard the escapeof gas therebetween and may be of slightly greater diameter than thewasher 19 to retard the escape of gas between the latter and the flange3.

Vllhen the element 6 is volatilized, removal of the ferrules 2 from themember 1. permits the withdrawal of the terminal members 4. One or bothof the wall structures 23 at the ends of the member 1 may be removedfrom the members 4 before or after replacing the volatilized element inposition between the portions 7. Thus the members 4, connected by a newelement 6, may be placed in the member 1 from either end thereof and thewall structures 23 replaced, after which the ferrules 2 may be screwedinto position on the member 1.

The unitary-wall structure or compound Washer 23 is adapted to beattached to and detached from the member 4 by a single orse slidingIHOX'QEIirfittoward.

{N543 dge only of the better, the

- terior of the t greatly facilitating the manipulation of the device.

The arrangement further serves as an efficient gas and flame check tominimize the danger to surrounding objects, forms a neat and compactdevice, and by reason of the relation existing between the web 10 andthe member 16, reduces the end wall to substan' tially a; minimum ofthickness and material.

\Vhile we have shown and described particular' forms of our invention,many changes may be effected therein, without departing from the spiritand scope thereof, as set forth in the appended claims.

Vi e claim as our invention:

1. A refillable cartridge fuse comprising a tubular insulating bodymember, a terminal member disposed at the end thereof, and having atransverse web portion having its greatest dimension less than thediameter of the interior thereof, means for preventing the turning ofthe terminal member with respect to the tubular member, a memberconforming to the web portion and embracing the same to form a disk ofgreater diam eter than the interior of the tubular member, means forpreventing longitudinal displacement of said embracing member withrespect to said terminal member and means for maintaining all of themembers in relative position with respect to said tubular member.

2. A refillable cartridge fuse comprising a tubular body member, aterminal member disposed at the end thereof, a transverse web portionrigidly and gas-tightly mounted on said terminal member and being ofless extent in its greatest transverse dimension than the diameter ofsaid tubular member,

means for preventing the turning of the terminal member with respect tothe tubular member, a member embracing the web portion and constitutingtherewith a single composite disk of greater diameter than the interiorof the tubular member, means for preventing relative longitudinaldisplacement of the members constituting said disk, and a removableferrule for securing all of the members in relative position.

3. A refillable cartridge fuse comprising a tubular body member, aterminal blade member disposed at the end thereof, a transverse webconnected to the blade member and of smaller lateral dimensions than theinterior of the tubular member, said connection being gas tight. meansfor preventing the turning of the blade member with respect to thetubular n Q-r-r, a. plate engaging the web and to; er therewithconstituting a. single composite disk of uniform thickness and gr w terdiameter than the in ar member. a sh colds-l packing washer, a metal warsimi- .lis- 3 1:

lar to the latter and joined thereto, said the web, and a removableferrule securing similar washers being slipped transversely all of themembers in relative position.

over the terminal member and 00-0 erating In testimony whereof, we havehereunto 10 therewith to prevent longitudinal is laeesubscribed ournames this 21st day of Jan, ment of said plate with respect to sai web,1919.

said similar washers also serving as a gas JOSEPH H. PROCTER.

seal over the engaging edges of the plate and MAURITS J. SANDIN.

